Getting Qt's signalslot mechanism in standard C++

Signalslot connection in sequence diagram qt signal slot In Qt, we have an alternative to the callback technique: We use signals and slots A signal is emitted when a particular event occurs Qt's widgets have many qt slot Qt offers two different ways to write signal-slot connections in C++: The string-based connection syntax and the functor-based connection syntax

qt signal and slot When a signal is emitted, the slots connected to it are usually executed immediately, just like a normal function call When this happens, the signals and slots